Electric time-alarm.



( ML- I I No. 875,698. PATENTED JAN. 7, 1908.

E. DUBs.

lEI|}.`G'1`RIG TIME ALARM.

APPLIGATION FILED AUG.30.1808;

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11mm Raam Room Raum HNE noRms PETERS ca., wAsNlNcroN. n, c4

PATENTED JAN. 7, 1908.

E. DUBS. ELECTRIC TIME ALARM.

APPLIUATION FILED AUG. 30.1906.

2 SHEETS-#SHEET 2.

UNITED sTATEs EDUARD DUBS, OF OERLIKON, ZURICH, SWITZERLAND.

ELECTRIC TIME-ALARM.

Specification of Letters Patent.

Patented Jan. '7, 1908.

Application filed August 30, 1906. Serial No. 332,696-

To all whom 'it may concern:

Be it known that I, EDUARD Duns, a citizen of the Swiss Republic,residing at Oerlikon, Zurich, Switzerland, have invented certain new anduseful Improvements in Electrical Indicating-Clocks, of which the'followingis a specification.

This invention relates to a clock with electrical switch arrangement bymeans oi which. electrical apparatus, such as electric bells, electriclamps, relays, &c., can, at a previously determined hour, be switched onfor a given time.

In the annexed drawings the invention is shown, as an example, combinedwith a set of bells.

Figure 1 is an elevation; Fig. 2 a cross section and Figs. 3 and 4 aredetail views.

On the hour hand spindle of the gearing 1 is fitted a single armed lever2, the -free end oi which is provided with a spring contact. The latterconsists ol a pin 3 pivoted on the lever 2, and a contact piece 4attached to the pin and provided. with two projecting lips directedtowards the dial plate S. By the action of the spring 5 limited by theprojection 6 the contact piece is pressed towards the dial plate 8. Onthe inside of the latter is fastened the insulating plate 7. The gearing1 with the lever 2 can, by means of the set screws 9 ixed thereon, bebrought nearer to, or removed 'further from, the wall 10. It is thuspossible to determine the duration of the contact between the.contactpiece 4 and a contact pin 11 inserted in the dial plate. The contactpins inserted in the dial plate are held tight by the wire loops 12(Fig. 4) screwed on to the insulating plate 7. In two circular rowsconcentric with the hour hand spindle of the gearing holes are boredthrough the dial plate 8 and the insulating plate 7. In these holes arescrewed sockets 12 for the better guidance of the contact pins 11. Thearrangement of the holes shown corresponds to a 10 minute division fortwenty i'our hours. In order that this division shall not take up toomuch space on the dial plate the holes are arranged in two circular rowsand the inner one displaced with regard to the outer. The upper halfcircle corresponds to the hours of the day i'rom 6 a. m. to 6 p. m.,while the lower half circle corresponds to the hours ci' the night from6 p. m. to 6 a. m. This means that the lever 2 must only complete onerevolution each 24 hours and this is effected in the driving of thelever 2 from the hour hand by means of transmission gear'wheels 15. Bythe subdivision mentioned it is possible to set the arrangement 24 hoursbefore the signal is required to be given. The inside division oi' thedial plate is the ordinary hourly division (1-12) and is adapted to thehands of the clock. Above the dial plate are screwed on an insulatingplate 13 a row of contact pieces 14, each provided with a number, andhaving two holes for contact pins.

The gearing of the clock is connected with a source oi electricalenergy, Jfor example, with a battery B. The conductors 16 run from thecontact pieces for instance the numbered rooms of a hotel, and thenceback to the battery. The number of the room corresponds to the number ofthe contact piece 14. If now lfor example a guest in a room No. 1 wishesto be awakened at night at 12.40 and at the same time also a guest inroom No. 20, then a contact pin is inserted in the lower semi-circle atthe proper contact hole (Fig. 1) and a second contact pin, connected tothe 'lirst by a conductor C, is inserted in the contact piece 14numbered 1. The contact piece No. 1 is now also connected to the contactpiece 2O by a conductor C. In the same manner other connections could bemade.

When the clock is going one of the two lips oi' the contact piece 4strikes against the contact pin which projects somewhat beyond thesurface of the insulating plate 7 and is pointed at the end, and theelectrical circuit is established, until the lip has passed over thecontact pin. During this time the alarm bells in the rooms 1 and 20 areringing. The outside row oi contact holes corresponds to the outside lipand the inner row of contact holes to the inner lip of the contact piece4.

Instead of a system o'l bells other apparatus as for example electricalventilators, relays &c; can be operated, the drawings serving toillustrate diagrammatically any such application. The invention isparticularly applicable to hotels, manufactories, hospitals and otherlarge establishments.

What Iclaim as my invention and desire to secure by Letters Patent is 1.In an electrical indicating clock, a clock plate having Itwo concentricsets of holes arranged alternately, loose contact pins fitting the saidholes and arranged to project internally, the clock spindle, a contactlever mountedy on the .said spindle, gearing turning the lever onceevery twentyfour hours, brackets at the end of the lever, a pin parallelwith the lever turning in the said brackets, a spring and stopcontrolling the movement of the pin and a contact wing on the said pin,projecting Jfrom the front of the lever to meet the contact pins,substantially asherein de scribed.

2. In an electrical indicating clock, a clock plate having twoconcentric sets of holes, loose contact pins adapted to Iit in the saidholes and project internally, the pins having a conical end and anannular groove, wire loops secured behind each of the plate holes,adapted to receive the ends of the pins and engaged in their grooves,the clock spindle, and a contact lever on the said spindle adapted tomake Contact with the projecting pins, substantially as hereindescribed.

3. In an electrical indicating clock the combination of a contact makinglever on the clock hand, a spring contact piece on the lever, contactpins in a Yfixed clock plate, a parallel fixed plate carrying the clockgearing and adjusting screws regulating the distance of the gearing andcontact arm from the contact pins to determine the length of contact.

In witness whereof I have hereunto set my hand in the presence of twoWitnesses.

EDUARD DUBS. l/Vitnesses FRITZ LAUENER, A. LIEBERKNECHT.

